Throttle-valve.



110.816,21?. PATENTBD MAR. 27, 1906. J. s. CHAMBERS. THROTTLB VALVE.

APPLICATION FILED APR.11, 1905.

2 SHEETS-"SHEET 1.

ag #aw/11.5. A Xg PATENTBD MAR. 27, 1906.

J. S. CHAMBERS.

l THROTTLE VALVE. APPLICATION FILED 11.23.11, 1905.

2 SHEETS-SHEET 2.

narran safrs PATENT OFFICE.

THROTTLE-VALVE.

Specification of Letters Patent.

Patented March 2'?, 1906.

Application filed April 11 1905. Serial No. 254,947.

To @ZZ whom it muy concern,.-

Be it known that I, JOHN S. CHAMBERS, a citizen ofthe United States, and a resident oi lVilmington, in the county oi New Hanover and State of North Carolina, have invented a new and useful Improvement in Throttle- Valves, of which the following is a specifica* tion.

My invention relates to an improvement in throttle-valves, and has for its object to provide means projecting into the stand-pipe to a point beneath a valve for opening and closing the same.

A further object is to provide a device in which the movement of the means for opening the valve is increased after the valve has been started Jfrom its seat, so as to insure a rapid opening of the valve.

A still further object is to provide certain improvements in the construction, form, and arrangement of the several parts, whereby the valve may be operated in a very simple and easy manner.

A practical embodiment of the invention is represented in the accompanying drawings, in which- Figure 1 represents the stand-pipe and valve in top plan. Fig. 2 is a side view of the same. Fig. 3 is a cross-section taken in the plane of the line A A of Fig. 4. Fig. 4 is a view in side elevation, partially in section, taken in the plane at right angles to Fig. 2. Fig. 5 is a view in side elevation, partially in section, oi a modified form of throttle-valve; and Fig. 6 is a detail vertical central section showing a third form of throttle-valve- The stand-pipe is denoted by 1 and is herein shown as straight and arranged vertically. In the form shown in Figs. 1 to 4, inelusive, the throttle-valve comprises an outer valve 2, having its seat 3 on the top of the stand-pipe, and an inner valve 4, having its seat 5 at the center of the outer valve 2. The outer valve 2 is provided on its top with two lugs 6 and 7, arranged diametrically opposite. A cross bar or bolt 8 engages the two lugs and is removably held in position by means of a nut 9. rIhis bar is so arranged that after the inner valve 4 has been raised a short distance it will engage the bar and lift the outer valve 2 with it the remaining portion of its movement.

The inner valve 4 is provided with a piston 10, which is tted to slide in a centrally-arranged cylinder 11 uprising from the chamber 12 which extends entirely through the stand-pipe. The inner valve 4 is further provided with a valve-rod 13, which depends therefrom. The rod 13 is guided in its reciprocating movements by providing a cylindrical socket 14, extending downwardly from the chamber 12, within which socket the lower end 15 oi the valve-rod is located.

The stand-pipe is provided with two outwardly-projecting lugs 16 17 upon opposite sides oi the chamber 12, between which lugs is pivoted at 18 a two-armed rocking lever 19'20. The arm 19 of this rocking lever extends into the chamber 12, and its free end is engaged with the inner valve-rod 13. In the present instance this engagement is arranged by forming a tongue 21 on the end of the arm 19, which tongue is inserted through the valve-rod.

An operating-lever 22 23 is pivoted at 24 between two lugs 25 26, projecting outwardly from the stand-pipe 1 at a short distance below the rocking-lever-supporting lugs 16 17. The operating-lever 22 23 may be rocked by any suitable mechanism (not shown herein) which may be attached to the lower arm 23 of said lever. The upper arm 22 of the operating-lever is connected to the lower arm 20 ofthe rocking lever as follows: The arm 20 of the rocking lever is biiurcated, forming a recess 27 into which recess the upper end of the arm 22 -of the operating-lever extends.

A hole 28 is formed in the lever-arm 22, through which hole a small pin 29 passes, which pin is secured to the lever-arm 22. The relative diameters of the pin 29 and hole 28 are such that when the lever-arm 22 is rocked inwardly the pin 29 will not be engaged by the wall of the hole 28 until the arm 22 has been moved a short distance. The leverarm 22 is further provided with a lateral iiange 30, which engages the extreme end of the lever-arm 20 at a point a short distance below the pin-and-hole connection 29 28 when the lever-arms 20 and 22 are at or near the limits of their outward movements.

In operation when it is desired to open communication to the interior of the standpipe the operating-lever is rocked in position to move the arm 22 inwardly. This arm, because of the engagement of its iiange 30 with the free end oi' the arm 20 of the rocking lever, will move the arm 20 inwardly, thus moving the arm 19 upwardly, and with it the inner valve 4. During the iirst part of this movement a. great advantage oi leverage is obtained, because of the engagement of the IOO IIO

arm 22 oi" the operating-lever when it is pivm oted with the arm 20 at the greatest distance from its pivot. After the inner valve has been started from its seat and the arms 22 and 20 are rocked inwardly a short distance the outer wall of the hole 28 will engage the pin 29, thus shifting the leverage toward the pivot of the rocking lever 20. The continued inward movement of the arms 22 and 20 may be accelerated because of this shifting of leverage. This will accelerate the movement of the inner valve 4 and because oi" its engagement with the rod 8 of the outer valve will also rapidly lift the outer valve from its seat.

In the form shown in Fig. 5 I have shown a double valve, the lower member being denoted by 31, its seat by 32, and the outer member by 33 and its seat by 34. In this instance both the members 3l and 33 of the valve are raised simultaneously, In this form I have shown the operating -lever as connected te the rocking lever by a pin and elongated slot connection 35 36. In this form also the steam may be admitted to the interior of thestand-pipe downwardly between the valve member 33 and its seat 34 and upwardly between the valve member 3l and its seat 32 when the valve is open.

In the 'form shown in Fig. 6 the inner valve is shown as provided with wings 37, spaced a short distance beneath the outer valve, which wings are arranged to engage the bottom of the outer valve and raise it after the inner valve has been started from its seat.

What I claim as my invention isl. In a stand-pipe, a valve, its seat, and means for opening and closing the valve arranged to automatically reduce its leverage and thereby increase the movement of the valve after it has been started from its seat.

2. In a stand-pipe, inner and outer valves,

their seats, and means for opening and clos.

ing the valves arranged to automatically reduce its leverage and thereby raise the valve rapidly after the inner valve has been started from its seat.

3. In a vertical stand-pipe, inner and outer valves, their seats, an inner valve-rod, a rock* ing lever engaging the inner valve-rod at a point within the stand-pipe beneath the inner valve and means 'for operating the rocle ing lever to primarily lift the inner valve and secondarily lift the outer valve.

4. In a stand-pipe, a valve, a seat therefor, a valve-rod, a rocking lever engaging the rod and an operating-lever arranged to shift its connection with the rocking lever after the valve has been started from its seat to increase the movement of the valve.

5. In a stand-pipe, inner and outer valves, their seats, an inner valve-rod, a rocking lever engaging the same, and an operating-lever arranged to shift its connection with the rocking lever to increase its speed after the inner valve has been started from its seat.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 8th day of April, 1905.

JOI-IN S. CHAMBERS I/Vitnesses:

GEO. A. DEIBERT, C. W. BUTLER. 

